Typewriting machine



June 23, 1925.

C E. SMITH TYPEWRITING MACHINE Filed Nov. 9, 1924 2 Shgets-Sheet 1WITNESSES ATTORNEY June 23-,- 1925 1,543,193

' C. E. SMITH Y TYPEWRITING MACHINE Filti Nov. 8, 1924 2 Sheets-Sheet 2INV'ENTOR WITNESSES a f ATTORNEY to recondition them again for use.

Patented June 23, 19255.

nnrrs' stares PATENT easier.

CHARLES E. SMITH, OF BROOKLYN, NEEV- YORK, ASSIGNOR T0 REMINGTON TYPE-WP/ITEB COMPANY, OF ILION, 3513B?!- YQEK, A. CORPORATION OF NEVT YORK-TYLPEWRITING MACHINE.

Application filed November To all whom it may concern:

Be it known that LCHAnLn's' E. SMITH, a citizen of the United States,and resident of the borough of Brooklyn, city of New York,

in the county of Ixings and State of New York, have invented certain newand useful In such machines it is common to condition them to preventinjury to parts thereof while they are being carried or transported, andIn some such machines it is possib'l e'to operate'the printinginstrumentalities to strike the platen or the'paper thereon before themachine has been fully conditioned for use. This may result indestroying or marring the work sheet before the operator observes thatthe machine is not fully conditioned to proceed with the work.

The main object of my invention is to provide, in such a machine,improved means for overcoming this objection, and to compel a completeconditioning of the machine for use before the operator is enabled tooperate the printing instrumentalities.

'To the above and other ends-which will hereinafter appear, my inventionconsists in the features of construction, combinations of devices andarrangements of parts hereinafter described and particularly pointed outin the claims.

In the accompanyingdrawings, wherein like reference characters indicatecorresponding parts in the different views,

Figure 1 is a rear elevation with parts in section of a RemingtonPortable machine embodying my invention, the machine being 7 shownenclosed within its carrying case.

Figure 2 is a fragmentary vertical foreand-aft sectional view of themachine with parts omitted, the machinebeing shown only partlyconditioned for use- Figure 3 is a detail fragmentary bottom plan viewof the machine with parts omitted.

Figure 4 is a detail A erspective view of the key locking lever modifiedin accordance with my present invention.

Figure 5 is a detail fragmentary perspec: tive view showing a portion ofone of the printing key levers and the locking bar with s, 1924, SerialNo. 748,515.

which it .coacts to lock the printing instrumentalities against printingoperation.

Figure 6 is an enlarged detail fragmentary sectional view taken on theline 66 of Figure 2 and looking in the direction of the arrows at saidline.

I have shown my invention embodied, in the present instance, in a Remin'ton Portable machine, in which. the invention may be readily includedwith but avery slight change in the existing structure.

In the Remington Portable machine in order to condition the machine foruse, the type bars must first be expanded by one operation to a positionwhere they are free to strike against a platen, and the center lock forthe carriage must be hand released and the escapement renderedeffective, by another operation. 1 It sometimes happens that theoperator will expand the type bars and forget to hand release the centerlock and render the escapement effective to restrain the movement of thecarriage. The operator may then proceed to write and not discover thatthe carriage cannot. be fed until the work sheet is marred, mutilated ordestroyed. In accordance with my invention, as it is exemplified in thepresent instance, this difficulty is overcome by automatically lockingthe printing keys whenthe hand controlled center lock is renderedeffective and the carriage is centered and the escapement is renderedinefiective'to restrain the carriage, and by automatically releasingsaid keys when the center lock is rendered inefiective and theescapement rendered effective to restrain the carriage. Itfollows,l.therefore, that the printing keys cannot be actuated if thecenter lock is hand positioned to lock the carriage and render theescapement ineffective to restrain the car iage, thereby notifying theoperator that the machine mustbe further conditioned for use byreleasing the center lock and re-establishng the escapement inoperativecondition. I j I Various parts of the presentconstruction are disclosedand claimed in the application of Joseph B. Holden, filed Oct. 9, 1924,Sr. No. 742,528, the claiins of this case being restrictedtol featuresnot disclosed in said Holden application. 7

In the ordinary operation of a typewriting machine it is necessary attimes for an operator when making corrections to crowd in ill severalcharacters in a space formerly occupied by fewer characters. This issometimes done by releasing the carriage by the ordinary release key andmoving the carriage by one hand to, and holding it at, the desiredfractional letter space point to insert a character, while the operator,with the other hand, stri res the appropriate key to print the desiredcharacter to be inserted at the point in question, and so on with theremaining characters to be inserted. The

main object of the present invention is to accomplish the general endshereinbefore pointed out and yet enable crowded insertions to be made inthe manner indicated above, as will hereinafter more clearly appear.

In the accompanying drawings 1 have shown only so much of a RemingtonPortable machine as is necessary to arrive at an understanding of myinvention in its embodiment therein.

The machine comprises an outer sheet metal frame 1 and an inner frame 2,which latter supports most of the working parts of the machine. Eachtype action comprises a key lever 3 fulcrumed at L and provided with akey 5. Each key lever is connected through a link 6, sublever 7, secondlink 8, and second sub-lever 9 with a type bar 10. Operative connectionis established between each sublever 9 and the associated type bar bysegmental rack sections 11 and 12. The type bars are all mounted on apivot wire 13, on which the" are adapted to be turned from a collapsedlocked position to the effective position for use, shown in Fig. 2, whenordinarily they may be actuated to strike downwardly against the topface of the platen always maintained in the path thereof. The means foreffecting this conditioning of the type bars for use or fortransportation of the machine, comprises a rock shaft 14, controlled bya hand actuated crank arm 15. This rock shaft also carries crank arms16, pivoted to links 17; the latter being pivoted at their upper ends toa vertically shifta-ble support 18, having a pad 19 on which the typebars rest.

The non-folding carriage of this machine is mounted on its support inthe usual manner to travel from side to side of the machine, and toshift with the support fore-and-aft of the machine in the case shiftingmovements of said support; the carriage alwayssupporting the platen inposition for use. That portion of the case shift frame on which thecarriage support is mounted, and the means for shifting it to change thecase position of the platen, are of the usual construction, but are notshown in order to avoid confusion and afford a better illustration ofother parts of the construction. The carriage comprises a body plate orportion 20 to which end plates 21 are secured. The plate 20 is formedwith hearing port-ions 22 and 23 in-which crossed bearing rollers 2e arereceived. Said rollers bear against com- Janion tracks 25 and 26 on thecarriage support 27, and thus support the carriage for travelingmovement and always maintain it in operative position. A platen spindle28 is mounted to turn and to slide longitudinally in hearings in the endplates 21, the spindle being provided at oneend with a finger wheel 29.A platen is mounted on the spindle 28 to turn therewith and permitalongitudinal shi fting movement of the spindle independently of theplaten, byreason of a pin and slot connection (not shown) between theplaten and shaft. This feature, and the co-Operation of the spindle withthe center lock for the carriage, and the release of the carriage by thecenter lock, to be hereinafter described,

are fullydisclosed and are claimed in the co-pending application ofJoseph B. Holden, Sr. No. 547,128, filed March 27, 1922.

A hand controlled lever 31 is pivoted at 32 on the left-hand end plate21 of the carriage. This lever comprises three arms, one of whichconstitutes alocking finger or member 33, whereas the second terminatesin a inger piece 3st, and the third terminates in a locking finger ormember 35. The looking finger 33 passes into a transverse slot in thehearing member 21 for the left-hand end portion of the platen spindle28. In one position of the finger 83, it extends across the bore of saidslotted bearing member 21 and in the path of the spindle, to prevent alongitud nal displacement of the latter and the finger wheel 29 from thedotted to the full line position shown in Figure 1. From an inspectionof this figure,

it will be seen that when the finger wheel 29 is drawn out to the dottedline position for use, it extends into the path of a side wall of thecarrying case as and "ants the cover from being closed. The oprator iscompelled therefore to shift the lever 3 from the aosition where thefinger thereon lcks the spindl 28 against longitudinal movement to theFig. 2 position before the finger 1 9 wneel 29 can be shifted from itsobstructing position. In this last mentioned position the spindle withfinger wheel is free to be shifted from the dotted to the full lineposition in Figure 1. lVhen thus shifted, the spindle extends across thepath of return movement of the locking linger 33, effected by a spring37, and locks the lever 31 in the Fig. 2 position. The effect. of thisis to leave the carriage free from restraint of its escapement mechanismand to maintain the lock effective. Thus it will be seen that the fingerpiece is bent riage and constitutes a support for the feed rack 41 ofthecarriage escapement mecha msm. The plate, controlling member, orrack-support 40 is pivoted at 42 for independent movement on bracketarms 43 see cured to the body plate of the'carriage. Springs 44 bearagainst the plate and normally hold the plate at the limit of itsforward movement with the teeth of the feed rack engaging the feed dog45. Vhen the dog 45 is thus engaged, a printing operation is efi ective,through a train of connections not shown, tolower the feed dog 45 andbring the holding dog 46 into engagement with the rack, and duringthereturn movement of the dogs the carriage advances one letter space.is locked in the Fig. 2 position the finger piece 34 co-acting with thecarriage release lever 38 holdsthe feed rack 41 disengaged from thenormally engaged feed dog 45, as shown; This trees the spring-propelledcarriage'trom the restraint of its escapement mechanism and relieves thefeed dogs and rack from any injury that might result from shocks or arefrom the carria e in trans ortin the b 23 machine in its case. Since thecarriage is treetrom restraint ofits escapementmechin em at this time,it is desirable to provide other means for holding the carriage. I Thecenter lock, one member of which is formed the locking finger 35, isprovided for t1 is purpose. hen the lever 31 is moved to and locked inthe Fig. 2 position, as explained, the locking finger 35 is projecteddown through a slot in the carriage plate 20 and into effectiveposition. In this position the lower edge of thelocking finger 35 has apath of movement with the carriage in the normal line of travel of thelatter which will bring it into co-operat-ion with one or the other oftwo oppositely beveled faces 47 on the upstanding part of a companionspring locking member 48, secured by a, screw 49 to the bottom of thecarriage support 27. A locking slot or notch 50 is located be tween thetwo bevel edges 47 on the locking member 48. When the finger 35 islocked in its projected, Fig. 2, position, and the carriage is moved ineither direction to cen ter it in its line or travel, the finger 35 willbe seated in the locking notch 50 when said centered position isreached, thus holding the carriage against movement either to right orleft. The machine will thus be maintained with the feed rack releasedand the carriage centerdocked as long as the finger wheel remains in thecompacted, full line position, shown in Fig. 1. This condilVhen,however, the lever 31 of the inner frame 2 of the machine.

in Fig. 4.

tions the "machine for enclosure and transportation within its carryingcase after the type bars have been collapsed. To recondition the machinefor use, it is merely necessary to expand the type bars, as shown inFig. 2, and pullthefinger wheel 29 to the dotted line position in Fig.1, thereby freeing the lever .31 and bringing about a release of thecenter lock and a re-engagement of the feed rack with the feed dog 45.However, it sometimes occurs that the operator in conditioning themachine for use will expand the type bars but will forget to pull outthe finger wheel 29 before attempting to write; on the machine. In theRemington Portable machine the printing keys are free to belactuated atthis time to cause thetype bars to strike the platen or the paperthereon even though the carriage cannot be moved from its centeredposition. In accordance with the present invent-ion this objection isovercome by locking the printing keys against actuation until the centerlock has been released and. the rack re-engaged with the feed dog 45.This com- ,pels the operator to pull out the finger wheel 29. to efi'ectthis result before the printing keys can be actuated. The act of pullingout the finger wheel 29 and producing the above mentioned result isefiective to automatically release the locked printing keys, as willnowappear. 1 V

V The'detail construction thus far described is part of the regularequipment of the Remington Portable machine. In addition said machine isequipped with line lock mechanism coinprising'a locking bar 51 havingarms 52 at the ends thereof. These arms have ears 53 3G1f01flt6d. toreceivepins 5.4 which project inwardly from the side plates In thismanner the locking bar is pivotally mounted to 'swin ioreand-aft of them..- chine. The lower edge of this bar is bent rearwardly to form aflange 51 which, when the bar is in'locking position shown in Fi 2,extends beneath the forwardly extending bills 55v of the hook-likeprojectionson the printingkey levers. While the locking bar does notprevent all depressions of the key levers, it does, when in effectiveposition, prevent a full depression of any of the key leversand-prevents a movement of any type bar to printing position. A link 56extends fore-and-aft of the machine and is connected at one end to aperforated ear 57 on the locking bar, and at the other end to one arm ofa bell crank lever 58. This lever is mounted on a bracket arm 59 securedto a fixed part of the machine. j The other arm of the lever 58 isconnected to one end of a link 60 that extends transversely of themachine,and at its-other end projects through an opening 61 ina lever62, shown in detail A nut 63 is received on the inner threaded endportion of the link and bears against one side of the car 64 of thelever 62. A coiled expansion spring 65 surrounds the link 60 and bearsat one end against the ear 6%, and at its other end against a nut 66 onthe link 60. Motion is transmitted from the lever 62 to the link 60 andthe parts controlled thereby through the spring 65. The lever 62 ispivoted at 67 on the carria e support 2? and extends rearwardly of itsfulcrum .where it is slotted at 68 to receive a headed screw 69 threadedinto a supporting bracket 70, and operating to limit the motion of thelever 62. The rear end of the lever 62 is provided with an off-set arm71 that terminates in an edge 72, with which the usual adjustable linelock actuating member (not shown) on the carriage co-acts to turn thelever 62 when the carriage reaches the end of a line. This motion istransmitted through the intermediate train of connections to the lockingbar 51 to move it to the locking position, shown in Fig. 2. V i

The key locking construction as thus far described constitutes part ofthe usual line lock equipment of the Remington Portable machine. Inaccordance with my invention, as shown in the present embodimentthereof, 1 have provided a forwardly extending finger 73 on the outerend of the arm 71, said finger terminating in a rounded contact 74. Thiscontact, as will be seen from an inspection of Fig. 3 is located to oneside of avertical fore and-aft plane extending through the body portionof the lever 62 and the pivot 67 thereof. The contact 74 is located,inthe present instance, in the rear of and normally free from-contactwith, the plate or feed rack support 40. The feed rack support 40 isprovided or formed with a rearwardly extended rounded proturberance,contact, actuating projection, or interponent 75. his contact is locatedabout midway of the rack support and has a path of travel with thecarriage which will bring it into alignment or register with the contact74; when the carriage is centered in its line of travel, and where thecenter lock is effective to hold the carriage centered. At all otherpoints or letter space positions in the travel of the carriage thecontact 75 is out of register with the contact 7%. The construction andarrangement of the parts are such that when the contacts 74 and 75 areout of register the release of the feed rack, by either the release key38 or the center lock key 34, will be ineffective to actuate the lever62 and the key lock controlled thereby. When, however, the carriage iscentered or in position where the center lock is effective to lock thecarriage, the interponent 7 4 will be brought into register with thecontact 75. A forward movement of the center lock key 34 at this time isefiective to move the locking finger 35 down into the slot 50, to movethe rack support or member 40 rearwardly to disengage the rack from thedog 45, and through the registering contacts 74 and Y5 actuate themember 62 to cause it to turn onits pivot in the direction of the curvedarrow in Fig.

3, and to move the locking bar 51 to efie'ctive position. The parts willremain in this condition as long as the feed rack is maintaineddisengaged from the feed dog 45. When the rack is returned to its normalposition to re-engage said dog 45, the lever 62 and the locking bar 51will be returned to normal position by a returning spring 76 connectedto the bell crank lever 58.

By this arrangement'the carriage release key may be actuated at any oneof, say, 84 r of the 85 letter space positions of the carriage withoutactuating the key look, so that characters may be crowded in in themanner hereinbefore described. Yet said key lock will be actuated by 'athrowing out of the feed rack by the center lock key at the only pointin the travel of the carriage where the key lock under control ofthecenter lock is necessary for the purpose of the present 111-vention;-that is to say, when the carriage is centered in position to beheld by the center look, at which time it is also desired to lock therack released.

From an inspection of Fig. 6, it will'be seen that the'co-acting facesof the contacts 7e and 75 are rounded. It will be under stood thereforethat if the operator should actuate the key 8% when the carriage is ateither side of its centered position, and run the carriage to suchposition to center lock it, the following operation will result: Anactuation of the key 34 while the carriage is off-centered will notresult in actuatingthe key lock. Vhcmhowever, the carriage is moved toits centered position while pressure is maintained on the key 3%, thepro jected contact 7., will act with a camming effect on the contact 74and actuate the key look just asthe carriage reaches the centeredposition and the center lock engages.

It will be understood therefore that the oper ation of the key lock bythe center lock or the carriage release key 18 dependent-on the positionof the carriage in its line of travel and that at only one point in thisline can nearest letter space position to the left there of if theinsert is in a fractional space position. If the insert is to be made atthe exact letter space position in question the operator has merely tooperate the desired printing key alter the engagement of the If theinsert s to operator in such position with one hand the other hand mayactuate the requisite printing key to insert the character to beprinted. The backward movement of the carriage to the right referred toabove may be efiected either by an end pressure exerted on the carriageor by an operation of the usual back spacing key. It will be understood,however, that it is only when the carriage is at this one point in itsline of travel that it is necessary to effect an insert in this manner.At all other points an insert may be effected by a direct movement ofthe carriage thereto and while the carriage release key is held in itsactuated position as previously described. a

From the foregoing it will be understood that whenever the carriage iscentered, and the lever 31 is locked inthe Fig. 2 position to releasethe feed'rack and render the center lock effective, as shown, theprinting keys will be locked against printing actuation, even though thetype bars be expanded ready for use. Then, however, the finger wheel 29is pulled out to the dotted line position, this will release the lockedlever 31 and it will be returned by its spring 37 to normal position.The effect of this is to release the center lock, returnthc feed'rack todogengaging position and move thekey locking bar 51 to releasingposition, so that the machine is fully conditioned for use, assumingthat the type bars have been moved to expanded position. has thus beenfully conditioned for use, the type bars cannot be actuated to print onthe work sheet.

From the foregoing description it will be 7 understood that by mypresent invention I have provided, with but slight. change, aconstruction which embodies a train of operative connectionsintermediate both finger pieces 34 and 38 and the key lock, and that isuch connections include an interponent 7 5 But until the machine that Iclaim as new and desire to secure by Letters Patent is r 1. In atypewriting or like 'machine, the combination of a carriage, printingkeys, a lock for preventing a printing actuation of said keys, a fingerpiece for actuating said lock to render it effective, and means whichrender said finger piece effective-to thus actuate saidlock only whenthe carriage 1s at agiven point in its travel.

2. In a typewriting or like machine, the' combinationof a carriage,printing keys, a lock for preventing a prlntlng actuation of said keys,a finger piece, and means which" render sald finger piece effective toactuatev said lock only when the carriage is centered in its line oftravel.

3. In a typewriting or like machine, the combination of a carriage, acenter lock for locking the carriage centered in its line of travel,printing keys, a key lock for locking said keys against printingactuation, and means by which the center lock, isrendered efiec'tive tocontrol the key look only when the carriage is centered torender thecenter lock active.

4. In a typewriting or like machine, the combination of a carriage,escapement mechanism therefor, printing keys, a lock for locking saidkeys against printingactuation, carriage releasing means for freeing thecarriage fnom restraint of the escapement mechanism, and means whichenable the carriage releasing means to control said look only when thecarriage is at a given point in its travel.

5. In a typewriting or like machine, the

combination of a carriage, escapement mechanism therefor, a center lockfor locking the carriage centered in its line of travel, printing keys,a'key lock for lockingsaid keys against printing actuation, means whichenable the center lock to free the carriage from restraint of itsescapement mechanism, and means. which enable said center lock tocontrol said key lock only when the carriage is centered in its line oftravel.

6. In a typewriting or like machine, the combination of a carriage,printing keys, a lock therefor, a finger piece displaceable from normalposition for rendering said lock effective, and means dependent on theposition of the carriage in its line of travel to determinethe'effectiveness orineffectiveness of said displaceable finger piece toactuate said lock to render it effective.

7.*In a typewriting or like machine, the combination of a carriage,printing keys, a lock therefor, a finger piece, and a train of operativeconnections intermediate said,

finger piece and lock including an interponent moved by the carriage ata given point in the line of travel of the latter to a position thatrenders the train of conliil) nections effective to transmit movementfrom said finger p1ece to said lock to actuate it and thereby preventprinting actuation of said keys.

,8; In a typewriting or like machine, the combination of a r" ge,printing keys, alock therefor, 1 piece, and a train of operativeconnections intermediate said lin er piece and lock including a membercarried by the carriage. to travel therewith and receive an independentmovement thereon and which is git V uch independent movement by saidling piece, saio member carrying a contact that registers with a coactimember only at given point in the travel of the carriage and only atsuch point transmits the independent movement of the carriage carriedmember to its coacting member to actuate the lock.

9. In a typeivriting or like machine, the combination of a carriage,printing keys, a lock therefor, a key carried by the carriage andoperative to release it from restraint of its feed mechanism, and meanscapable of being controlled by said key at only one point in the line oftravel of the carriage for actuating said lock.

10. In a typewriting or like machine, the combination of a carriage,cscapement mechanism therefor, a ccnte lock for locking the carriagecentered in its line of travel, printing keys, ocking means for lockingsaid keys t printing actuation, a controlling key, and means controlledthere by for releasing the carriage from the restraint of its escapementmechanism, for rendering said center lock etlectlve and for actuatingsaid key locking means to pre vent printing actuation of the printingkeys, the construction and arrangementof the parts being such to rendersaid controlling key capable of actuating said key locking means at onlyone point in the travel of the carriage.

11. In typeivriting or like machine, the combination of a carriage,escapement mechanism therefor comprising a releasable rack, which whenreleased frees the carriage from restraint of its escapement mechanism,printing keys, locking means for preventing printing actuation of saidkeys, and means for actuating said locking means to lock the keys whenthe rack is released and the carriage is centered in its line of travelbut inefiective to actuate the locking means at other points in thetravel of the carriage.

12. In typewritin or like machine, the combination of a carriage,escapement mechanism therefor, a center lock for locking the carriagecentered in its line of travel, printing keys, locking means for lockingsaid keys against printing actuation, a controlling key, and meanscontrolled thereby for releasing the ce-trria 'e from the restraint ofits escapement mechanism, for rendering said center lock effective andfor actuating said key locking means to prevent printing actuation ofthe printing keys, a return movement of said controlling key to normalposition restoring the carriage to control of its es capement mechanism,rendering the center lock ineffective and releasing the printing keysfrom restraint of their locking means, the construction and arrangementof the parts being such that the elfectiveness of the said controllingkey to actuate the key. lock is determined by the position of thecarriage in its lineyof travel.

13. In a typewriting or like machine, the combination of a carriage,escapement mechanism. therefor including a releasable feed rack forfreeing the carriage from restraint of the escapement mechanism,printing keys, andlocking means for said keys operative by the releasingmovement of said feed rack only if the carriage is centered in its lineof travel.

l i. In a type'ivriting or like machine, the combination of a carriage,escapement mechanism therefor, printing keys, an'da lock for lockingsaid keys against printing actuation including a controlling membercarried by the carriage support and a second hand-actuated controllingmember carried by the carriage and co-operative with said firstmentioned controlling member at only a given point in the travel of thecarriage to actuate the lock and also operative at the same time to freethe carriage from restraint of its escapement mechanism.

15. In a typewriting or like machine, the combination of a carriage, acenter lock for locking the carriage centered in its line of travel,printing keys, a lock for locking said keys against printing actuation,a linger piece carried by and movable on the carriage, and meanscontrolled by said finger piece for rendering said center lock effectiveand for actuating said key lock to prevent a printing operation ofsaidkeys, the construction and arrangement of the parts being such thatsaid finger piece is effective on said key lock only when the carriageis centered in its line of travel. 7

16. In a typevvriting or like machine, the combination of a carriage,escapement mechanism therefor, a center lock for locking the carriagecentered in its line of travel, printing keys, a lock for locking saidkeys against printing actuation, a finger piece carried by and movableon the carriage, and means controlled by said finger piece for renderingsaid center lock effective for actuating said key lock to prevent aprinting operation of said keys and for freeing the carriage fromrestraint of its escapement mechanism, the effectiveness of said lingerpiece to actuate the key lock depending on the position of the carriagein its line of travel.

17. In a typewriting or like machine, the combination of a carriage, aplate carried by and extending lengthwise 1n the direction of the travelof the carriage and movable independently thereon, means for controllingthe independent movement of said plate, escapement mechanism for thecarriage, printing keys, a lock for locking said keys against printingactuation, and means that enable the independent movement of said 18. Ina typewriting or like machine, the

combination oi a'carriage, a plate carried by and extending lengthwisein the direction of the travel or the carriage and movable thereon, acenter lock for locking the carriage centered in its line of travel,printing keys, and key locking means controlled byv said plate only whenthe carriage is centered in its line of travel.

19. In a typewriting or like machine, the combination of a carriage, aplate carried by and extending lengthwise in the di ection of the travelof the carriage and independently movable thereon, an actuating projection at a given point in the length of said plate, escapementmechanism for the carriage releasable to free the carriage fromrestraint thereof by an independent movement of said plate, a centerlock for locking the carriage centered in its line 01 travel, printingkeys, and key locking means controlled by said actuating projection.

20. In a typewriting or like machine, the combination of a carriage, aplate carried by and extending lengthwise in the direction of the travel01": the carriage and movable independently thereon, an actuatingprojection carried by said plate substantially midwayin the lengththereof, escapement mechanism for the carriage including a feed rackcarried by said plate and which frees the carriage from restraint ofsuch escapement mechanism by the independent movement of said plate, acenter lock for locking the carriage against movement in eitherdirection in its line of travel, printing keys, and key locking meanscontrolled by said actuating projection, whereby a movement of thecenter lock to effective position is operative to release the carriagefrom restraint of its escapement mechanism but is operative to renderthe key lock effective only in the event that the carriage is centeredin its line of travel.

21. In a typewriting or like machine, the combination of a carriage, aplaten carried thereby, a finger wheel for said platen movable into andout of compact position, a center lock for locking the carriage in itsline of travel and which includes a finger piece for moving it toeffective position, means by which the finger wheel is prevented frombeing moved to the compact position when said center lock is inefiectiveand which retains the center lock efiective when the finger wheel is incompact position, printing keys, a lock therefor, and means foroperatively connecting the center lock and key lock only when thecarriage is centered in its line of travel so that at this time only isthe center lock effective on the key lock.

22. In a typewriting or like machine, the

combination of a carriage, printing keys,

line lock mechanism "for locking said keys against-printing operationwhen the carriage reaches the end of a line, a center lock for lockingthe carriage centered in its line of travel, and means by which saidcenter lock is rendered effective to actuate said line lock mechanismonly in the event that the carriage is centered in its line of travel,whereby said keys will be maintained locked as long as the center lockis effective and will be released when said center lock is released.

Signed at the borough of Manhattan, city of New York, in the county ofNew York and State of New York, this 30th day of October, A. D. 1924.

v CHARLES E. SMITH. Witnesses:

E. M. WELLS, L. NELSON.

